According to conservative rabbi, Benjamin Sendrow, the commandment to “Honor your father and your mother” is the number one commandment, the most important commandment of Judaism in the “Ten Commandments”, commonly known as the Decalogue. He writes that evidence of this is that this commandment helps fight against narcissism.
Rabbi Sendrow explains that to “Honor your father and your mother” [is] the most important of the Ten Commandments." In fact, the essay he wrote was about this commandment and Yom Kippur. A curious read will show that the sin can be atoned on Yom Kippur, in his view.
 Read full essay here